I'm also completely against such an option. If you bid on a player, you have to be sure that you'd take him if no one else outbids you. So you just have to be careful where to place bids. And if you've found a cheaper player then it's just bad luck ... this cancel-bid-button would mess up the whole TL-System ....
Winner: 1x Consolation Tournament (U21), 2x Goldene Ananas, 1x Goldene Himbeere, 2x Goldener Erdapfel, 3x Bronze Medal (U21)